fixes to scm_rev generation to make it conistent with windows build

src/common/CMakeLists.txt

@@ -1,4 +1,4 @@
-configure_file("${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.cpp.in" "${CMAKE_CURRENT_BINARY_DIR}/scm_rev.cpp" @ONLY)
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.cpp.in" "${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.cpp" @ONLY)
 
 set(SRCS    break_points.cpp
             console_listener.cpp
@@ -13,10 +13,10 @@ set(SRCS    break_points.cpp
             misc.cpp
             msg_handler.cpp
             string_util.cpp
+            scm_rev.cpp
             symbols.cpp
             thread.cpp
             timer.cpp
-            utf8.cpp
-            ${CMAKE_CURRENT_BINARY_DIR}/scm_rev.cpp)
+            utf8.cpp)
 
 add_library(common STATIC ${SRCS})

src/common/scm_rev.cpp.in

@@ -5,13 +5,13 @@
 #include "common/scm_rev.h"
 
 #define GIT_REV      "@GIT_REV@"
-#define GIT_REF_SPEC "@GIT_REF_SPEC@"
+#define GIT_BRANCH   "@GIT_BRANCH@"
 #define GIT_DESC     "@GIT_DESC@"
 
 namespace Common {
 
 const char g_scm_rev[]      = GIT_REV;
-const char g_scm_ref_spec[] = GIT_REF_SPEC;
+const char g_scm_ref_spec[] = GIT_BRANCH;
 const char g_scm_desc[]     = GIT_DESC;
 
 } // namespace