Disable GCC UTF-8 manifest via configure switch

The UTF-8 manifest was added in GCC 13 but the configure switch was not
added until GCC 14 (https://gcc.gnu.org/PR111170). Better to use the
swtich rather than the original hack. Thanks to Peter0x44 for pointing
this out (#58).

Author: skeeto

src/variant-x86.patch

@@ -1,43 +1,41 @@
 --- a/Dockerfile
 +++ b/Dockerfile
-@@ -65,3 +65,3 @@ COPY src/w64devkit.c src/w64devkit.ico \
+@@ -62,3 +62,3 @@
 
 -ARG ARCH=x86_64-w64-mingw32
 +ARG ARCH=i686-w64-mingw32
 
-@@ -93,2 +93,3 @@ RUN /mingw-w64-v$MINGW_VERSION/mingw-w64-headers/configure \
+@@ -90,2 +90,3 @@
          --with-default-msvcrt=msvcrt-os \
 +        --with-default-win32-winnt=0x0501 \
   && make -j$(nproc) \
-@@ -99,2 +100,5 @@ RUN ln -s $ARCH mingw
- 
-+# Disable UTF-8 manifest for Windows XP (#58)
-+RUN echo >/gcc-$GCC_VERSION/gcc/config/i386/winnt-utf8.manifest
-+
- WORKDIR /x-gcc
-@@ -103,2 +107,3 @@ RUN /gcc-$GCC_VERSION/configure \
+@@ -102,2 +103,3 @@
          --with-sysroot=/bootstrap \
 +        --with-arch=pentium4 \
          --target=$ARCH \
-@@ -132,4 +137,4 @@ RUN /mingw-w64-v$MINGW_VERSION/mingw-w64-crt/configure \
+@@ -138,4 +140,4 @@
          --disable-dependency-tracking \
 -        --disable-lib32 \
 -        --enable-lib64 \
 +        --enable-lib32 \
 +        --disable-lib64 \
          CFLAGS="-Os" \
-@@ -217,2 +222,3 @@ RUN /mingw-w64-v$MINGW_VERSION/mingw-w64-headers/configure \
+@@ -223,2 +225,3 @@
          --with-default-msvcrt=msvcrt-os \
 +        --with-default-win32-winnt=0x0501 \
   && make -j$(nproc) \
-@@ -227,4 +233,4 @@ RUN /mingw-w64-v$MINGW_VERSION/mingw-w64-crt/configure \
+@@ -233,4 +236,4 @@
          --disable-dependency-tracking \
 -        --disable-lib32 \
 -        --enable-lib64 \
 +        --enable-lib32 \
 +        --disable-lib64 \
          CFLAGS="-Os" \
-@@ -251,2 +257,3 @@ RUN /gcc-$GCC_VERSION/configure \
+@@ -257,2 +260,3 @@
          --with-native-system-header-dir=/include \
 +        --with-arch=pentium4 \
          --target=$ARCH \
+@@ -277,2 +281,3 @@
+         --disable-win32-registry \
++        --disable-win32-utf8-manifest \
+         --enable-mingw-wildcard \