cmake clang/compiler_flags.cmake: Re-enable -Wsometimes-uninitialized

All warnings in the code base have been resolved.

Signed-off-by: Tom Hughes <tomhughes@chromium.org>

Author: thughes

cmake/compiler/clang/compiler_flags.cmake

@@ -101,7 +101,6 @@ check_set_compiler_property(APPEND PROPERTY warning_dw_3
 
 check_set_compiler_property(PROPERTY warning_extended
                             #FIXME: need to fix all of those
-                            -Wno-sometimes-uninitialized
                             -Wno-self-assign
                             -Wno-address-of-packed-member
                             -Wno-unused-function