[yocto] [meta-security][PATCH] clamav: fix gcc 6.x build failure.

[Armin Kuster]

./llvm/include/llvm/Support/AlignOf.h:57:24: error: expected unqualified-id before 'alignof'
 static inline unsigned alignof() { return AlignOf<T>::Alignment; }
                        ^~~~~~~

compile with -std=gnu++98

alt in future is to us llvm3X and configure --with-system-llvm --with-llvm-linking=dynamic.

Signed-off-by: Armin Kuster <akuster808 at gmail.com>
---
 recipes-security/clamav/clamav_0.99.2.bb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/recipes-security/clamav/clamav_0.99.2.bb b/recipes-security/clamav/clamav_0.99.2.bb
index 184d605..73905a7 100644
--- a/recipes-security/clamav/clamav_0.99.2.bb
+++ b/recipes-security/clamav/clamav_0.99.2.bb
@@ -50,6 +50,8 @@ EXTRA_OECONF += " --with-user=${UID}  --with-group=${GID} \
             --disable-rpath \
             "
 
+CXXFLAGS += "--std=gnu++98"
+
 do_configure () {
     cd ${S}
     ./configure ${CONFIGUREOPTS} ${EXTRA_OECONF} 
-- 
2.7.4