btrfs-progs: tests: drop 32-on-64bit build support

Building 32bit binaries on 64bit hosts is tedious due to all the
required libraries with the right target, also the static versions.
Limit the build only to the native arch.

Signed-off-by: David Sterba <dsterba@suse.com>

tests/build-tests.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
-# test various compilation options
-# - 32bit, 64bit
+# Test various compilation options:
+# - native arch
 # - dynamic, static
 # - various configure options
 #
@@ -8,7 +8,6 @@
 #
 # Requirements for full coverage:
 # - static version of all libs
-# - 32bit/64bit libraries, also the static variants
 
 make=make
 opts="-j16 $@"
@@ -57,12 +56,6 @@ build_make_targets() {
 	# defaults, busybox
 	target='btrfs.box btrfs.box.static'
 	buildme
-	# defaults, 32bit
-	target="EXTRA_CFLAGS=-m32"
-	buildme
-	# defaults, 64bit
-	target="EXTRA_CFLAGS=-m64"
-	buildme
 	# defaults, library
 	target="library-test"
 	buildme