[newlib-cygwin] Cygwin: Use absolute path to libltp includes

[newlib-cygwin] Cygwin: Use absolute path to libltp includes

[Jon TURNEY]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=fb967562b02e0bed196d3c149191b174ed90e674

commit fb967562b02e0bed196d3c149191b174ed90e674
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Wed Oct 28 20:20:27 2020 +0000

    Cygwin: Use absolute path to libltp includes
    
    Use an absolute path to libltp includes, to allow for the fact that
    we'll be compiling tests in a subdirectory.

Diff:
---
 winsup/testsuite/Makefile.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/winsup/testsuite/Makefile.in b/winsup/testsuite/Makefile.in
index 53eb67308..a9388ef6a 100644
--- a/winsup/testsuite/Makefile.in
+++ b/winsup/testsuite/Makefile.in
@@ -143,7 +143,7 @@ site.exp: ./config.status Makefile
 	@echo "set CFLAGS \"$(ALL_CFLAGS)\"" >> ./tmp0
 	@echo "set MINGW_CXX \"$(MINGW_CXX)\"" >> ./tmp0
 	echo "set tmpdir $(objdir)/testsuite" >> ./tmp0
-	@echo "set ltp_includes \"$(libltp_srcdir)/include\"" >> ./tmp0
+	@echo "set ltp_includes \"$(realpath $(libltp_srcdir))/include\"" >> ./tmp0
 	@echo "## All variables above are generated by configure. Do Not Edit ##" >> ./tmp0
 	@cat ./tmp0 > site.exp
 	@cat site.bak | sed \