installdeps: Move git mod checkout after git inst.

Make sure git is part of the base package list for Win32 builds.

Move the `git submodule update` out of `check_cross()` and into the
Win32 build sections.

Allow it to fail, in case the user is not using a git clone, the cmake
checks will produce an error if the subtree does not exist.

This fixes the problem with the git submodule update failing because git
is not installed yet.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

installdeps

@@ -281,9 +281,6 @@ check_cross() {
                     error "target must be one of 'm32', 'win32', 'MinGW-w64-i686', 'win64' or 'MinGW-w64-x86_64'"
                     ;;
             esac
-
-            # get the necessary win32 headers
-            check git submodule update --init --remote --recursive
             ;;
         m32|-m32)
             target=m32
@@ -398,7 +395,7 @@ debian_installdeps() {
         check sudo apt-get --allow-unauthenticated -qq -y update
 
         # Native wx-common needed for wxrc executable.
-        check sudo apt-get --allow-unauthenticated -qy install build-essential cmake ninja-build ccache wx-common "$@"
+        check sudo apt-get --allow-unauthenticated -qy install build-essential cmake ninja-build ccache wx-common git "$@"
 
         # The ccache symlink is broken in some versions of these mxe packages.
         ccache_link=/usr/lib/mxe/.ccache/bin/ccache
@@ -407,6 +404,9 @@ debian_installdeps() {
             sudo mkdir -p ${ccache_link%/*}
             sudo ln -sf /usr/bin/ccache "$ccache_link"
         fi
+
+        # get the necessary win32 headers
+        git submodule update --init --remote --recursive
     fi
 
     build_instructions
@@ -580,6 +580,9 @@ fedora_installdeps() {
             done
         fi
 
+        # get the necessary win32 headers
+        git submodule update --init --remote --recursive
+
         warning='SFML is required for LINK support, Fedora does not currently have a MinGW SFML package, if you want LINK support you will need to install it manually'
     fi
 
@@ -766,6 +769,9 @@ rhel_installdeps() {
             done
         fi
 
+        # get the necessary win32 headers
+        git submodule update --init --remote --recursive
+
         warning='SFML is required for LINK support, RHEL/EPEL does not currently have a MinGW SFML package, if you want LINK support you will need to install it manually'
     fi
 
@@ -951,6 +957,9 @@ EOF
         done
         [ $# -gt 0 ] && check $pacman --noconfirm --needed -S "$@"
 
+        # get the necessary win32 headers
+        git submodule update --init --remote --recursive
+
         warning 'SFML is required for LINK support, the SFML package in AUR is currently broken, if you want LINK support you will need to install it manually'
     fi
 
@@ -1071,9 +1080,10 @@ windows_installdeps() {
     done
 
     # install
-    check pacman --noconfirm --needed -S git make zip ccache "$@"
+    check pacman --noconfirm --needed -S git make zip "$@"
 
-    cmake_flags="$cmake_flags -G 'MSYS Makefiles'"
+    # get the necessary win32 headers
+    check git submodule update --init --remote --recursive
 
     if [ "$MSYSTEM" = MSYS ]; then
         case "$target" in
@@ -1180,7 +1190,7 @@ build_instructions() {
 Done! To build do:
 
 $pre_build
-mkdir -p build && cd build
+mkdir build && cd build
 $CMAKE .. $cmake_flags -G Ninja
 ninja
 $post_build