contrib: use the 10.3.9 SDK for compilation on PowerPC-based Macs

extras/contrib/bootstrap

@@ -63,11 +63,11 @@ case $HOST in
 # Makefile cross compiling is only supported with gcc-4.0
 # ENVP defines the oldest environment on which the program will be able to run
 # SDK 10.2.8 requires gcc-3.3 (so we cannot use that SDK)
-	    SDK_TARGET=10.4
+	    SDK_TARGET=10.3
 	    echo "SDK_TARGET = ${SDK_TARGET}" >> config.mak
 	    echo "HAVE_DARWIN_OS = 1" >> config.mak
 	    echo "ENVP = MACOSX_DEPLOYMENT_TARGET=${SDK_TARGET}" >> config.mak
-	    echo "MACOSX_SDK = /Developer/SDKs/MacOSX10.4u.sdk" >> config.mak
+	    echo "MACOSX_SDK = /Developer/SDKs/MacOSX10.3.9.sdk" >> config.mak
 	    CFLAGS_TUNING=" -mtune=G4"
 	    EXTRA_CFLAGS=" -D\${ENVP} -isysroot \${MACOSX_SDK}"
 	    EXTRA_LDFLAGS=" -isysroot \${MACOSX_SDK} -Wl,-syslibroot,\${MACOSX_SDK}"