gnutls: build out-of-source

src/gnutls.mk

@@ -19,7 +19,8 @@ define $(PKG)_UPDATE
 endef
 
 define $(PKG)_BUILD
-    cd '$(1)' && autoreconf -fi && ./configure \
+    cd '$(SOURCE_DIR)' && autoreconf -fi
+    cd '$(BUILD_DIR)' && '$(SOURCE_DIR)'/configure \
         $(MXE_CONFIGURE_OPTS) \
         --disable-rpath \
         --disable-nls \
@@ -30,7 +31,8 @@ define $(PKG)_BUILD
         --without-p11-kit \
         --disable-silent-rules \
         CFLAGS='-D_WIN32_WINNT=0x0600'
-    $(MAKE) -C '$(1)' -j '$(JOBS)' install
+    $(MAKE) -C '$(BUILD_DIR)' -j '$(JOBS)'
+    $(MAKE) -C '$(BUILD_DIR)' -j 1 install
 
     '$(TARGET)-gcc' \
         -W -Wall -Werror -ansi -pedantic \