Set deployment target to 10.6

Author: rowanj

GitX.xcodeproj/project.pbxproj

@@ -1486,6 +1486,7 @@
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				MACOSX_DEPLOYMENT_TARGET = 10.6;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				STRIP_INSTALLED_PRODUCT = NO;
@@ -1501,6 +1502,7 @@
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				MACOSX_DEPLOYMENT_TARGET = 10.6;
 				SDKROOT = macosx;
 			};
 			name = Release;