Fix CFI problem in SystemInfo_vulkan.cpp

SystemInfo_vulkan.cpp gets and call vulkan functions
with pointers. It cause test failures with Linux CFI
bot. Fix the problem, by disabling cfi checking for
it.

Bug: chromium:1340081
Change-Id: Ife04cd2002d77324a665393b6a05cdd5193284bf
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3915081
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Auto-Submit: Peng Huang <penghuang@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
diff --git a/BUILD.gn b/BUILD.gn
index efaf090..e842d0f 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -531,6 +531,7 @@
   deps = []
   libs = []
   defines = []
+  configs = []
 
   if (angle_build_vulkan_system_info) {
     sources += libangle_gpu_info_util_vulkan_sources
@@ -539,6 +540,7 @@
       "src/common/vulkan:angle_libvulkan_loader",
       "src/common/vulkan:angle_vulkan_icd",
     ]
+    configs += [ "$angle_root:angle_no_cfi_icall" ]
     if (angle_enable_vulkan_system_info) {
       defines += [ "ANGLE_USE_VULKAN_SYSTEM_INFO" ]
     }