[bazel] Port 8e999e3 (#171946)

Added a new preprocessor macro to llvm-config.h which needs to be
reflected on the bazel side.

Author: boomanaiden154

utils/bazel/llvm-project-overlay/llvm/include/llvm/Config/llvm-config.h

@@ -127,6 +127,9 @@
  * in non assert builds */
 #define LLVM_UNREACHABLE_OPTIMIZE 1
 
+/* Define if building LLVM with LLVM_ENABLE_IO_SANDBOX */
+/* LLVM_ENABLE_IO_SANDBOX */
+
 /* Define to 1 if you have the DIA SDK installed, and to 0 if you don't. */
 #define LLVM_ENABLE_DIA_SDK 0
 

utils/bazel/llvm_configs/llvm-config.h.cmake

@@ -126,6 +126,9 @@
  * in non assert builds */
 #cmakedefine01 LLVM_UNREACHABLE_OPTIMIZE
 
+/* Define if building LLVM with LLVM_ENABLE_IO_SANDBOX */
+#cmakedefine01 LLVM_ENABLE_IO_SANDBOX
+
 /* Define to 1 if you have the DIA SDK installed, and to 0 if you don't. */
 #cmakedefine01 LLVM_ENABLE_DIA_SDK