gnu: binutils: Shorten file names of MinGW patches.

This ensures we stay below the POSIX tar file name length limit.

* gnu/packages/patches/binutils-mingw-w64-reproducible-import-libraries.patch:
Rename to...
* gnu/packages/patches/binutils-mingw-w64-deterministic.patch: ... this.
* gnu/packages/patches/binutils-mingw-w64-specify-timestamp.patch:
Rename to...
* gnu/packages/patches/binutils-mingw-w64-timestamp.patch: ... this.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/cross-base.scm (cross-binutils): Likewise.

gnu/local.mk

@@ -776,8 +776,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/bidiv-update-fribidi.patch		\
   %D%/packages/patches/binutils-boot-2.20.1a.patch		\
   %D%/packages/patches/binutils-loongson-workaround.patch	\
-  %D%/packages/patches/binutils-mingw-w64-specify-timestamp.patch \
-  %D%/packages/patches/binutils-mingw-w64-reproducible-import-libraries.patch \
+  %D%/packages/patches/binutils-mingw-w64-timestamp.patch	\
+  %D%/packages/patches/binutils-mingw-w64-deterministic.patch	\
   %D%/packages/patches/blender-2.79-newer-ffmpeg.patch		\
   %D%/packages/patches/blender-2.79-python-3.7-fix.patch	\
   %D%/packages/patches/bluez-CVE-2020-0556.patch		\

gnu/packages/cross-base.scm

@@ -98,9 +98,8 @@
                  ((target-mingw? target)
                   (package-with-extra-patches
                    binutils
-                   (search-patches
-                    "binutils-mingw-w64-specify-timestamp.patch"
-                    "binutils-mingw-w64-reproducible-import-libraries.patch")))
+                   (search-patches "binutils-mingw-w64-timestamp.patch"
+                                   "binutils-mingw-w64-deterministic.patch")))
                  (else binutils))
            target)))