2.3.12 source tarball build error

[Yasuaki Taniguchi/谷口康明]

> Hello,
>
> I started building Gnucash 2.3.12 from tarball, and found some errors.
>
> (1) mysql-connector-c-noinstall-6.0.1-win32.zip is not on the mirror site.
>
> (2) packaging/win32/libmysql.def is missing.

(3) gnucash configure warning
############################################################
###  GnuCash
############################################################
configure: WARNING: unrecognized options: --with-aqbanking-dir

(4) webkit-1.0.pc search error in configure
checking the html engine... webkit
checking for webkit-1.0 >= "1.0"... no
Package webkit-1.0 was not found in the pkg-config search path. Perhaps you shou
ld add the directory containing `webkit-1.0.pc' to the PKG_CONFIG_PATH environme
nt variable No package 'webkit-1.0' found
configure: error: Library requirements (webkit-1.0 >= "1.0") not met; consider a
djusting the PKG_CONFIG_PATH environment variable if your libraries are in a non
standard prefix so pkg-config can find them.