avoid conflict with major/minor macros in sys/types.h

Index: api/proto/common/types/base_types.proto
--- api/proto/common/types/base_types.proto.orig
+++ api/proto/common/types/base_types.proto
@@ -46,8 +46,8 @@ message CommandStatusResponse
  */
 message KiCadVersion
 {
-  uint32 major = 1;
-  uint32 minor = 2;
+  uint32 vmajor = 1;
+  uint32 vminor = 2;
   uint32 patch = 3;
 
   // Full identifier string, potentially containing git hashes, packager-added info, etc.
