package/oracle-mysql: add mysql_config to ORACLE_MYSQL_CONFIG_SCRIPTS

Add mysql_config to ORACLE_MYSQL_CONFIG_SCRIPTS so the per-package fix
added by commit a18c828bed99d7e0db5128224ffcda4897cd8e80 will be applied
to this file which will avoid the following build failures with
libodb-mysql, open2300 or rsyslog:

configure:3286: /home/giuliobenetti/autobuild/run/instance-3/output-1/per-package/libodb-mysql/host/bin/powerpc-buildroot-linux-uclibc-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os -g0  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  conftest.c -rdynamic -L/home/giuliobenetti/autobuild/run/instance-3/output-1/per-package/libodb-mysql/host/powerpc-buildroot-linux-uclibc/sysroot/usr/lib/mysql -lmysqlclient -L/home/giuliobenetti/autobuild/run/instance-3/output-1/per-package/oracle-mysql/host/powerpc-buildroot-linux-uclibc/sysroot/usr/lib -lz -lnsl -lm >&5
/home/giuliobenetti/autobuild/run/instance-3/output-1/per-package/libodb-mysql/host/bin/../lib/gcc/powerpc-buildroot-linux-uclibc/10.3.0/../../../../powerpc-buildroot-linux-uclibc/bin/ld: cannot find /lib/libc.so.1
/home/giuliobenetti/autobuild/run/instance-3/output-1/per-package/libodb-mysql/host/bin/../lib/gcc/powerpc-buildroot-linux-uclibc/10.3.0/../../../../powerpc-buildroot-linux-uclibc/bin/ld: cannot find /usr/lib/uclibc_nonshared.a
/home/giuliobenetti/autobuild/run/instance-3/output-1/per-package/libodb-mysql/host/bin/../lib/gcc/powerpc-buildroot-linux-uclibc/10.3.0/../../../../powerpc-buildroot-linux-uclibc/bin/ld: cannot find /lib/ld-uClibc.so.1

Fixes:
 - http://autobuild.buildroot.org/results/9e3c09dd3d9bd55de14fc89a1d17ba9c008b195b
 - http://autobuild.buildroot.org/results/b42c8c86e9574ba9f2c04daa3476206270241a66
 - http://autobuild.buildroot.org/results/08156c934e9b4d946c354dbaf78ea5d9ae9a4701

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 7413b8c6e4a2359b3f3f6e0fe8b83d77e0b46142)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/oracle-mysql/oracle-mysql.mk

@@ -15,6 +15,7 @@ ORACLE_MYSQL_LICENSE = GPL-2.0
 ORACLE_MYSQL_LICENSE_FILES = README COPYING
 ORACLE_MYSQL_SELINUX_MODULES = mysql
 ORACLE_MYSQL_PROVIDES = mysql
+ORACLE_MYSQL_CONFIG_SCRIPTS = mysql_config
 
 # Unix socket. This variable can also be consulted by other buildroot packages
 MYSQL_SOCKET = /run/mysql/mysql.sock