7016976: Documentation for required ant version on JDK7 builds on Solaris 10 and Solaris 11

Reviewed-by: rinaldo

make/common/shared/Defs-versions.gmk

@@ -208,7 +208,7 @@ ifeq ($(PLATFORM), windows)
 endif
 
 # Generic
-REQUIRED_ANT_VER          = 1.6.3
+REQUIRED_ANT_VER          = 1.7.1
 REQUIRED_BOOT_VER         = 1.6
 REQUIRED_FREETYPE_VERSION = 2.3.0
 REQUIRED_MAKE_VER         = 3.81

make/common/shared/Sanity.gmk

@@ -1259,10 +1259,10 @@ ANT_CHECK :=$(call CheckVersions,$(ANT_VER),$(REQUIRED_ANT_VER))
 sane-ant_version:
 	@if [ "$(ANT_CHECK)" != "same" \
 	      -a "$(ANT_CHECK)" != "newer" ]; then \
-	  $(ECHO) "WARNING: The version of ant being used is older than \n" \
+	  $(ECHO) "ERROR: The version of ant being used is older than \n" \
 	    "      the required version of '$(REQUIRED_ANT_VER)'. \n" \
 	    "      The version of ant found was '$(ANT_VER)'. \n" \
-	    "" >> $(WARNING_FILE) ; \
+	    "" >> $(ERROR_FILE) ; \
 	fi
 
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