Use configured value instead of hardcoded path

diff -up mariadb-10.1.18/scripts/mysql_install_db.pl.in.pbasedir mariadb-10.1.18/scripts/mysql_install_db.pl.in
--- mariadb-10.1.18/scripts/mysql_install_db.pl.in.pbasedir	2016-10-04 19:03:15.562101826 +0200
+++ mariadb-10.1.18/scripts/mysql_install_db.pl.in	2016-10-04 19:04:47.833130195 +0200
@@ -320,7 +320,7 @@ elsif ( $opt->{basedir} )
                     find_in_basedir($opt,"file","mysqld-nt",
                                   "bin");  # ,"sql"
   $srcpkgdatadir  = find_in_basedir($opt,"dir","fill_help_tables.sql",
-                                    "share","share/mysql");  # ,"scripts"
+                                    "share","@INSTALL_MYSQLSHAREDIR@");  # ,"scripts"
   $buildpkgdir    = $srcpkgdatadir;
   $scriptdir      = "$opt->{basedir}/scripts";
 }
diff -up mariadb-10.1.18/scripts/mysql_install_db.sh.pbasedir mariadb-10.1.18/scripts/mysql_install_db.sh
--- mariadb-10.1.18/scripts/mysql_install_db.sh.pbasedir	2016-10-04 19:03:22.714104025 +0200
+++ mariadb-10.1.18/scripts/mysql_install_db.sh	2016-10-04 19:08:11.457186833 +0200
@@ -283,17 +283,17 @@ then
     cannot_find_file mysqld $basedir/libexec $basedir/sbin $basedir/bin
     exit 1
   fi
-  langdir=`find_in_basedir --dir errmsg.sys share/english share/mysql/english`
+  langdir=`find_in_basedir --dir errmsg.sys share/english @INSTALL_MYSQLSHAREDIR@/english`
   if test -z "$langdir"
   then
-    cannot_find_file errmsg.sys $basedir/share/english $basedir/share/mysql/english
+    cannot_find_file errmsg.sys $basedir/share/english $basedir/@INSTALL_MYSQLSHAREDIR@/english
     exit 1
   fi
-  srcpkgdatadir=`find_in_basedir --dir fill_help_tables.sql share share/mysql`
+  srcpkgdatadir=`find_in_basedir --dir fill_help_tables.sql share @INSTALL_MYSQLSHAREDIR@`
   buildpkgdatadir=$srcpkgdatadir
   if test -z "$srcpkgdatadir"
   then
-    cannot_find_file fill_help_tables.sql $basedir/share $basedir/share/mysql
+    cannot_find_file fill_help_tables.sql $basedir/share $basedir/@INSTALL_MYSQLSHAREDIR@
     exit 1
   fi
   scriptdir="$basedir/scripts"