package/libgit2: Bump to version 1.0.0

package/libgit2: Bump to version 1.0.0

This version changes the required dependencies as well as introducing
new bundled ones...

- Switch to the tarball released by upstream.
- Start depending on httpparser, instead of using the bundled one.
- Force using regcomp instead of using a bundled pcre.
- Add license for a bundled wildmatch and sha1.

Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
[yann.morin.1998@free.fr: reorder licenses; two spaces in hash file.]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>