libgpg-error: fix build error on macOS

src/gen-lock-obj.sh runs in /bin/sh which does not support echo -n on macOS,
and generates garbage. Resolved by using printf which is posix compliant.

Signed-off-by: Georgi Valkov <gvalkov@abv.bg>

libs/libgpg-error/patches/011-macos-compile-fix.patch

@@ -0,0 +1,24 @@
+--- a/src/gen-lock-obj.sh
++++ b/src/gen-lock-obj.sh
+@@ -84,17 +84,16 @@ EOF
+ #     USE_LONG_DOUBLE_FOR_ALIGNMENT
+ #
+ 
+-echo -n "#define GPGRT_LOCK_INITIALIZER {$LOCK_ABI_VERSION,{{"
++printf "#define GPGRT_LOCK_INITIALIZER {$LOCK_ABI_VERSION,{{"
+ 
+ i=0
+ while test "$i" -lt $ac_mtx_size; do
+     if test "$i" -ne 0 -a "$(( $i % 8 ))" -eq 0; then
+-        echo ' \'
+-        echo -n "                                    "
++        printf " %s\n                                    " "\\"
+     fi
+-    echo -n '0'
++    printf '0'
+     if test "$i" -lt $(($ac_mtx_size - 1)); then
+-        echo -n ','
++        printf ','
+     fi
+     i=$(( i + 1 ))
+ done