[PATCHV2] libgcrypt: fix building error with '-O2' in sysroot path

[simit.ghane]

Characters like '-O2' or '-Ofast' will be replaced by '-O1' and '-O0'
respectively when compiling cipher and random in the filesystem
paths as well if they happen to contain '-O2' or '-Ofast

If we are cross compiling libgcrypt and sysroot contains such
characters, we would
get compile errors because the sysroot path has been modified.

Fix this by adding blank spaces and tabs before the original matching
pattern in the sed command.

Signed-off-by: simit.ghane <simit.ghane at lge.com>
---
 cipher/Makefile.am | 2 +-
 random/Makefile.am | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/cipher/Makefile.am b/cipher/Makefile.am
index 2c39586ea3..a914ed2ba4 100644
--- a/cipher/Makefile.am
+++ b/cipher/Makefile.am
@@ -168,7 +168,7 @@ gost-s-box$(EXEEXT_FOR_BUILD): gost-s-box.c
 
 
 if ENABLE_O_FLAG_MUNGING
-o_flag_munging = sed -e 's/-O\([2-9sgz][2-9sgz]*\)/-O1/' -e 's/-Ofast/-O1/g'
+o_flag_munging = sed -e 's/[[:blank:]]-O\([2-9sgz][2-9sgz]*\)/ -O1 /' -e 's/[[:blank:]]-Ofast/ -O1 /g'
 else
 o_flag_munging = cat
 endif
diff --git a/random/Makefile.am b/random/Makefile.am
index 0c935a0595..340df38a79 100644
--- a/random/Makefile.am
+++ b/random/Makefile.am
@@ -56,7 +56,7 @@ jitterentropy-base.c jitterentropy.h jitterentropy-base-user.h
 
 # The rndjent module needs to be compiled without optimization.  */
 if ENABLE_O_FLAG_MUNGING
-o_flag_munging = sed -e 's/-O\([1-9sgz][1-9sgz]*\)/-O0/g' -e 's/-Ofast/-O0/g'
+o_flag_munging = sed -e 's/[[:blank:]]-O\([2-9sgz][2-9sgz]*\)/ -O0 /' -e 's/[[:blank:]]-Ofast/ -O0 /g'
 else
 o_flag_munging = cat
 endif
-- 
2.34.1