gcc: Dont escape backslash in deps

mingw-w64-gcc/0015-makedeps-properly-handle-win-paths.patch

@@ -0,0 +1,10 @@
+--- gcc-10.1.0/libcpp/mkdeps.c.orig	2020-05-10 20:37:27.263933600 +0300
++++ gcc-10.1.0/libcpp/mkdeps.c	2020-05-10 20:42:00.700896900 +0300
+@@ -156,7 +156,6 @@
+ 	      /* FALLTHROUGH  */
+ 
+ 	    case '#':
+-	    case ':':
+ 	      buf[dst++] = '\\';
+ 	      /* FALLTHROUGH  */
+ 

mingw-w64-gcc/PKGBUILD

@@ -21,7 +21,7 @@ pkgver=10.1.0
 #_majorver=${pkgver:0:1}
 #_sourcedir=${_realname}-${_majorver}-${_snapshot}
 _sourcedir=${_realname}-${pkgver}
-pkgrel=1
+pkgrel=2
 pkgdesc="GCC for the MinGW-w64"
 arch=('any')
 url="https://gcc.gnu.org"
@@ -59,6 +59,7 @@ source=("https://ftp.gnu.org/gnu/gcc/${_realname}-${pkgver%%+*}/${_realname}-${p
         0011-Enable-shared-gnat-implib.patch
         0012-Handle-spaces-in-path-for-default-manifest.patch
         0014-gcc-9-branch-clone_function_name_1-Retain-any-stdcall-suffix.patch
+        0015-makedeps-properly-handle-win-paths.patch
         0020-libgomp-Don-t-hard-code-MS-printf-attributes.patch
         0130-libstdc++-in-out.patch
         0140-gcc-8.2.0-diagnostic-color.patch)
@@ -77,6 +78,7 @@ sha256sums=('b6898a23844b656f1b68691c5c012036c2e694ac4b53a8918d4712ad876e7ea2'
             '3402f11c3edb3a2b0f27f7159c476879e1e6cddb05ac0327968d89ea245044c7'
             '11dd5388a1e1c0a2bc8bc3824726598784b9b9e0896a3d77950ba6a4569f1128'
             '21e31addcf13bc6fa6650b02ed0f2e195a1226260ae48c536840cc9230de2cfc'
+            '4233a8d893787413b316de3ac320fd65c46844d463b98c0a98fdc17100cca505'
             '276ecc392c777d4b17d771a987e80dca50ff25d8f65671d5de139be73997064b'
             '441d63d95622ffcc2fa5dd688aecad20d2ab16d7d275c567865a754e1d3d4b7a'
             '5240a9e731b45c17a164066c7eb193c1fbee9fd8d9a2a5afa2edbcde9510da47')
@@ -119,6 +121,7 @@ prepare() {
     0011-Enable-shared-gnat-implib.patch \
     0012-Handle-spaces-in-path-for-default-manifest.patch \
     0014-gcc-9-branch-clone_function_name_1-Retain-any-stdcall-suffix.patch \
+    0015-makedeps-properly-handle-win-paths.patch \
     0020-libgomp-Don-t-hard-code-MS-printf-attributes.patch
 
   apply_patch_with_msg \