enable ext/dba on AppVeyor

Author: weltling

appveyor/build_task.bat

@@ -27,7 +27,7 @@ if %errorlevel% neq 0 exit /b 3
 
 if "%THREAD_SAFE%" equ "0" set ADD_CONF=--disable-zts
 
-set EXT_EXCLUDE_FROM_TEST=snmp,oci8_12c,pdo_oci,pdo_odbc,odbc,pdo_firebird,interbase,ldap,imap,dba
+set EXT_EXCLUDE_FROM_TEST=snmp,oci8_12c,pdo_oci,pdo_odbc,odbc,pdo_firebird,interbase,ldap,imap
 if "%OPCACHE%" equ "0" set EXT_EXCLUDE_FROM_TEST=%EXT_EXCLUDE_FROM_TEST%,opcache
 
 call configure.bat ^