fix(ci): provide MinGW autotools pkg-config macros

- Install the MSYS pkgconf package for Aria2 source provisioning.\n- Expose MSYS and MinGW aclocal directories before autoreconf.\n- Keep release provisioning aligned with the CI dependency contract.

.github/workflows/ci.yml

@@ -136,7 +136,7 @@ jobs:
         with:
           msystem: MINGW64
           install: >-
-            base-devel autoconf automake libtool gettext-devel
+            base-devel autoconf automake libtool gettext-devel pkgconf
             mingw-w64-x86_64-gcc mingw-w64-x86_64-pkgconf
             mingw-w64-x86_64-openssl mingw-w64-x86_64-libssh2
             mingw-w64-x86_64-c-ares mingw-w64-x86_64-expat

.github/workflows/release.yml

@@ -110,7 +110,7 @@ jobs:
         with:
           msystem: MINGW64
           install: >-
-            base-devel autoconf automake libtool gettext-devel
+            base-devel autoconf automake libtool gettext-devel pkgconf
             mingw-w64-x86_64-gcc mingw-w64-x86_64-pkgconf
             mingw-w64-x86_64-openssl mingw-w64-x86_64-libssh2
             mingw-w64-x86_64-c-ares mingw-w64-x86_64-expat

scripts/aria2/build.sh

@@ -7,6 +7,7 @@ if command -v cygpath >/dev/null 2>&1; then
   source_root="$(cygpath -u "$source_root")"
   patch_file="$(cygpath -u "$patch_file")"
   export PATH="/mingw64/bin:/usr/bin:$PATH"
+  export ACLOCAL_PATH="/mingw64/share/aclocal:/usr/share/aclocal${ACLOCAL_PATH:+:$ACLOCAL_PATH}"
   export PKG_CONFIG_PATH=/mingw64/lib/pkgconfig
 fi
 cd "$source_root"