qca2 does not compile with mingw4

[Christian Ehrlicher]

libqca-ossl.dll doesn't link with mingw4 because of missing openssl
functions:

Linking CXX shared module ..\..\lib\libqca-ossl.dll
D:\kde\kde-mingw\lib\libssl.a(ssl_lib.o):ssl_lib.c:(.text+0x8db):
undefined reference to `OBJ_bsearch_'
D:\kde\kde-mingw\lib\libssl.a(ssl_ciph.o):ssl_ciph.c:(.text+0x18bd):
undefined reference to `EVP_PKEY_asn1_find_str'
D:\kde\kde-mingw\lib\libssl.a(ssl_ciph.o):ssl_ciph.c:(.text+0x18f1):
undefined reference to `EVP_PKEY_asn1_get0_info'
D:\kde\kde-mingw\lib\libssl.a(ssl_ciph.o):ssl_ciph.c:(.text+0x1a2e):
undefined reference to `EVP_PKEY_asn1_find_str'
D:\kde\kde-mingw\lib\libssl.a(ssl_ciph.o):ssl_ciph.c:(.text+0x1a62):
undefined reference to `EVP_PKEY_asn1_get0_info'
D:\kde\kde-mingw\lib\libssl.a(ssl_ciph.o):ssl_ciph.c:(.text+0x1aad):
undefined reference to `EVP_PKEY_asn1_find_str'
D:\kde\kde-mingw\lib\libssl.a(ssl_ciph.o):ssl_ciph.c:(.text+0x1ae1):
undefined reference to `EVP_PKEY_asn1_get0_info'
...


Christian