Use precompiled headers for some glslang projects
diff --git a/gtests/CMakeLists.txt b/gtests/CMakeLists.txt
index 15b73f4..4832baa 100644
--- a/gtests/CMakeLists.txt
+++ b/gtests/CMakeLists.txt
@@ -25,6 +25,8 @@
             # -- Remapper tests
             ${CMAKE_CURRENT_SOURCE_DIR}/Remap.FromFile.cpp)
 
+        PCH(TEST_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/pch.cpp)
+
         add_executable(glslangtests ${TEST_SOURCES})
         set_property(TARGET glslangtests PROPERTY FOLDER tests)
         glslang_set_link_args(glslangtests)