CI/Travis: Fix newly introduced cmake failure in Travis-CI after adding {fmt} (#3837)

* ci: Verify Travis works with cmake fix

* ci: Scope travis-ci to only `master` branch again

CMakeLists.txt

@@ -100,6 +100,3 @@ else()
         INSTALL(FILES "${CMAKE_SOURCE_DIR}/linux_various/PCSX2-linux.sh"          DESTINATION "${CMAKE_SOURCE_DIR}/bin")
     endif()
 endif()
-
-# Link Libraries
-target_link_libraries(PCSX2 fmt::fmt)

pcsx2/CMakeLists.txt

@@ -774,6 +774,7 @@ set(pcsx2FinalSources
 set(pcsx2FinalLibs
     Utilities
     x86emitter
+    fmt::fmt
     ${wxWidgets_LIBRARIES}
     ${GTK2_LIBRARIES}
     ${ZLIB_LIBRARIES}