external/libmspub: Update config.{guess,sub}

...with versions of those files from the latest
<http://ftp.gnu.org/gnu/automake/automake-1.15.tar.xz>.

The current versions would fail for Flathub aarch64 builds.

Change-Id: I4b42fa7c04f0570b31170b72d8a42786ae1dc252

external/libmspub/UnpackedTarball_libmspub.mk

@@ -15,6 +15,7 @@ $(eval $(call gb_UnpackedTarball_set_patchlevel,libmspub,0))
 
 $(eval $(call gb_UnpackedTarball_add_patches,libmspub,\
     external/libmspub/ubsan.patch \
+    external/libmspub/automake.patch \
 ))
 
 ifeq ($(COM_IS_CLANG),TRUE)

external/libmspub/iOS.patch.0

 --- config.sub	2012-06-30 14:54:32.000000000 +0200
 +++ config.sub	2017-06-13 12:15:26.000000000 +0200
-@@ -250,7 +250,8 @@
- 	| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
+@@ -253,7 +253,7 @@
  	| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
  	| am33_2.0 \
--	| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr | avr32 \
-+	| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | arm64 \
-+        | avr | avr32 \
-         | be32 | be64 \
+ 	| arc | arceb \
+-	| arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
++	| arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] | arm64 \
+ 	| avr | avr32 \
+ 	| be32 | be64 \
  	| bfin \
- 	| c4x | clipper \
-@@ -358,7 +359,7 @@
+@@ -374,7 +374,7 @@
  	| alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
  	| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
- 	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* \
+ 	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \
 -	| arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
 +	| arm-*  | armbe-* | armle-* | armeb-* | armv*-* | arm64-* \
  	| avr-* | avr32-* \