component/git: fix library path

without the fix, we get this on Debian 12 compilation:

[2023-06-13 16:19:14,522] INFO     Cloning into '/opt/slapgrid/575c4158f610d2eb6886264b60654ce8/parts/shellinabox-git-repository'...
[2023-06-13 16:19:14,526] INFO     /opt/slapgrid/shared/git/e7d6bd941dfb709752c59e8f2a2b9127/libexec/git-core/git-remote-https: error while loading shared libraries: libcurl.so.4: cannot open shared object file: No such file or directory
[2023-06-13 16:19:14,551] INFO     While:
[2023-06-13 16:19:14,551] INFO       Installing shellinabox-git-repository.

component/git/buildout.cfg

@@ -32,7 +32,7 @@ environment =
   NO_TCLTK=y
   PATH=${curl:location}/bin:${gettext:location}/bin:${tar:location}/bin:${xz-utils:location}/bin:%(PATH)s
   CPPFLAGS=-I${zlib:location}/include
-  LDFLAGS=-L${zlib:location}/lib -L${openssl:location}/lib -Wl,-rpath=${openssl:location}/lib -Wl,-rpath=${zlib:location}/lib
+  LDFLAGS=-L${zlib:location}/lib -L${openssl:location}/lib -Wl,-rpath=${openssl:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${curl:location}/lib
 
 [gitweb]
 <= git