Fix host xz/lzma leak in libxml2 macOS cross-builds.

Author: humbertodias

scripts/012-libxml2-2.9.12.sh

@@ -28,8 +28,12 @@ mkdir build-ppu && cd build-ppu
 ## Configure the build.
 CFLAGS="-I$PSL1GHT/ppu/include -I$PS3DEV/portlibs/ppu/include" \
 LDFLAGS="-L$PSL1GHT/ppu/lib -L$PS3DEV/portlibs/ppu/lib -lrt -llv2" \
+PKG_CONFIG_LIBDIR="$PS3DEV/portlibs/ppu/lib/pkgconfig" \
 PKG_CONFIG_PATH="$PS3DEV/portlibs/ppu/lib/pkgconfig" \
-../configure --prefix="$PS3DEV/portlibs/ppu" --host="powerpc64-ps3-elf" --enable-static --disable-shared --without-ftp --without-http --without-python
+../configure --prefix="$PS3DEV/portlibs/ppu" --host="powerpc64-ps3-elf" \
+    --enable-static --disable-shared \
+    --without-ftp --without-http --without-python \
+    --without-lzma
 
 ## Compile and install.
 jobs=$(nproc 2>/dev/null || sysctl -n hw.ncpu)