Merge pull request #17279 from yashykt/linuxversionmanylinux

Include linux/version.h for manylinux

include/grpc/impl/codegen/port_platform.h

@@ -121,6 +121,7 @@
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
+#include <linux/version.h>
 #elif defined(ANDROID) || defined(__ANDROID__)
 #define GPR_PLATFORM_STRING "android"
 #define GPR_ANDROID 1