gecko: unbreak with more strict regex(3) on FreeBSD 13

In file included from ../.build/dom/workers/Unified_cpp_dom_workers0.cpp:11:
dom/workers/ChromeWorkerScope.cpp:56:10: error: use of undeclared identifier 'JS_InitCTypesClass'
    if (!JS_InitCTypesClass(aCx, aGlobal) ||
         ^
dom/workers/ChromeWorkerScope.cpp:61:18: error: unknown type name 'JSCTypesCallbacks'
    static const JSCTypesCallbacks callbacks = {
                 ^

PR:		233453
Reported by:	kevans

1 files changed, 20 insertions, 0 deletions

diff --git a/www/firefox/files/patch-bug1509757 b/www/firefox/files/patch-bug1509757
new file mode 100644
index 000000000000..9260fc5d5f81
--- /dev/null
+++ b/www/firefox/files/patch-bug1509757
@@ -0,0 +1,20 @@
+Don't rely on GNU regex extension for character classes.
+
+$ echo --with-system-nspr --with-system-nss | gsed -e 's/--with-system-nspr\S* *//'
+--with-system-nss
+$ echo --with-system-nspr --with-system-nss | sed -e 's/--with-system-nspr\S* *//'
+sed: 1: "s/--with-system-nspr\S* ...": RE error: trailing backslash (\)
+
+diff --git old-configure.in old-configure.in
+index 7722587fadac..acf5d8d67a60 100644
+--- old-configure.in
++++ old-configure.in
+@@ -4405,7 +4405,7 @@ ac_configure_args="$_SUBDIR_CONFIG_ARGS"
+ 
+ # --with-system-nspr will have been converted into the relevant $NSPR_CFLAGS
+ # and $NSPR_LIBS.
+-ac_configure_args="`echo $ac_configure_args | sed -e 's/--with-system-nspr\S* *//'`"
++ac_configure_args="`echo $ac_configure_args | sed -e 's/--with-system-nspr[[^[:space:]]]* *//'`"
+ 
+ if test "$_INTL_API" = no; then
+     ac_configure_args="$ac_configure_args --without-intl-api"