[newlib-cygwin] Cygwin: Launch cygmagic with bash, not sh

[Corinna Vinschen <corinna@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=58ac5f985c926bfd1b9efbf1a430e826fe3b668c

commit 58ac5f985c926bfd1b9efbf1a430e826fe3b668c
Author: Mark Geisert <mark@maxrnd.com>
Date:   Sun Dec 6 22:17:15 2020 -0800

    Cygwin: Launch cygmagic with bash, not sh
    
    On some systems /bin/sh is not /bin/bash and cygmagic has bash-isms in
    it.  So even though cygmagic has a /bin/bash shebang, it also needs to be
    launched with bash from within Makefile.in.

Diff:
---
 winsup/cygwin/Makefile.in | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/winsup/cygwin/Makefile.in b/winsup/cygwin/Makefile.in
index b15c746cf..a840f2b83 100644
--- a/winsup/cygwin/Makefile.in
+++ b/winsup/cygwin/Makefile.in
@@ -683,10 +683,10 @@ globals.h: mkglobals_h globals.cc
 ${DLL_OFILES} ${LIBCOS}: globals.h $(srcdir)/$(TLSOFFSETS_H)
 
 shared_info_magic.h: cygmagic shared_info.h
-	/bin/sh $(word 1,$^) $@ "${COMPILE.cc} -E -x c++" $(word 2,$^) SHARED_MAGIC 'class shared_info' USER_MAGIC 'class user_info'
+	/bin/bash $(word 1,$^) $@ "${COMPILE.cc} -E -x c++" $(word 2,$^) SHARED_MAGIC 'class shared_info' USER_MAGIC 'class user_info'
 
 child_info_magic.h: cygmagic child_info.h
-	/bin/sh $(word 1,$^) $@ "${COMPILE.cc} -E -x c++" $(word 2,$^) CHILD_INFO_MAGIC 'class child_info'
+	/bin/bash $(word 1,$^) $@ "${COMPILE.cc} -E -x c++" $(word 2,$^) CHILD_INFO_MAGIC 'class child_info'
 
 dcrt0.o sigproc.o: child_info_magic.h