Remove -fvisibility-inlines-hidden from CMAKE_C_FLAGS

because this is only valid for C++.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 8668335711)

modules/TDEMacros.cmake

@@ -1780,7 +1780,7 @@ macro( tde_setup_gcc_visibility )
     endif( TDE_FOUND )
 
     set( __KDE_HAVE_GCC_VISIBILITY 1 )
-    set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
+    set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden")
     set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
   endif( )
 endmacro( )