firefox: fix build on loongson3 (and possibly others)

- (loongson3) Disable Clang due to missing ld.lld (linkage failure).
- (loongson3) Use the bfd linker.
- Make wasi-sysroot sandbox optional.

app-web/firefox/autobuild/defines

@@ -10,9 +10,9 @@ PKGDES="Standalone Web browser from Mozilla"
 PKGBREAK="firefox-i18n<=43.0.1"
 PKGREP="firefox-i18n<=43.0.1"
 
-# FIXME: lld of llvm 15 in ppc64le failure for firefox. Skip for now.
-# FIXME: ld.lld of llvm 15 complains about "relocation R_MIPS_64 cannot be used against local symbol" in loongson3. Skip for now
 USECLANG=1
+# FIXME: ld.lld is not available.
+USECLANG__LOONGSON3=0
 
 ABSPLITDBG=0
 ABSTRIP=0

app-web/firefox/autobuild/mozconfig

@@ -25,13 +25,9 @@ ac_add_options --allow-addon-sideload
 ac_add_options --with-google-location-service-api-keyfile="$SRCDIR"/autobuild/google-api-key
 ac_add_options --with-google-safebrowsing-api-keyfile="$SRCDIR"/autobuild/google-api-key
 
-# WASI.
-ac_add_options --with-wasi-sysroot=/usr/lib/wasm32-wasi/
-
 # Toolchain settings.
 ac_add_options --enable-release
 ac_add_options --disable-strip
-ac_add_options --enable-linker=lld
 ac_add_options --enable-hardening
 
 ## Optimize

app-web/firefox/autobuild/prepare

@@ -13,6 +13,18 @@ if ab_match_arch ppc64el; then
         >> "$SRCDIR"/autobuild/mozconfig
 fi
 
+if ! ab_match_arch loongson3; then
+    echo "ac_add_options --enable-linker=lld" \
+        >> "$SRCDIR"/autobuild/mozconfig
+    echo "ac_add_options --with-wasi-sysroot=/usr/lib/wasm32-wasi/" \
+        >> "$SRCDIR"/autobuild/mozconfig
+else
+    echo "ac_add_options --enable-linker=bfd" \
+        >> "$SRCDIR"/autobuild/mozconfig
+    echo "ac_add_options --without-wasm-sandboxed-libraries" \
+        >> "$SRCDIR"/autobuild/mozconfig
+fi
+
 cp -v "$SRCDIR"/{autobuild/,}mozconfig
 
 if [[ "${CROSS:-$ARCH}" = "powerpc" || "${CROSS:-$ARCH}" = "ppc64" ]]; then

app-web/firefox/spec

@@ -1,5 +1,5 @@
 VER=117.0.1
-REL=1
+REL=2
 CHKUPDATE="anitya::id=5506"
 SRCS="tbl::https://archive.mozilla.org/pub/firefox/releases/$VER/source/firefox-$VER.source.tar.xz \
       file::rename=ach.xpi::https://archive.mozilla.org/pub/firefox/releases/$VER/linux-x86_64/xpi/ach.xpi \