Log Message:
libXmu: update to 1.2.0.

This release raises the minimum version of libXt required to 1.1.0
(released in 2011), and for those builders who need to regenerate
the autoconf files, raises the minimum version of autoconf required
to 2.70 (released in 2020).

Alan Coopersmith (21):
      configure: raise minimum autoconf requirement to 2.70
      src/Makefile.am: Remove hardcoded -D_BSD_SOURCE
      configure: Use LT_INIT from libtool 2 instead of deprecated AC_PROG_LIBTOOL
      test: Convert test code to use glib test helpers
      test: Add simple test cases for functions in src/RdBitF.c
      test: Add simple test cases for functions in src/CursorName.c
      test: Add simple test cases for functions in src/Lower.c
      test: Add simple test cases for functions in src/StrToBS.c
      test: Add simple test cases for functions in src/StrToGrav.c
      test: Add simple test cases for functions in src/StrToJust.c
      test: Add simple test cases for functions in src/StrToLong.c
      test: Add simple test cases for functions in src/StrToOrnt.c
      test: Add simple test cases for functions in src/StrToShap.c
      test: Add simple test cases for functions in src/reallocarray.c
      XmuReadBitmapDataFromFile: set close-on-exec when opening files
      unifdef hpux
      unifdef Lynx
      Remove "#ifndef notdef" checks
      unifdef SYSV
      Use XtAsprintf to simplify os_name string generation
      libXmu 1.2.0