[scons] workaround FreeBSD11 fullstatic link error
[scons] workaround FreeBSD11 fullstatic link error

The error for reference:

/usr/lib/libc.a(arc4random.o): In function `arc4random':
/usr/src/lib/libc/gen/arc4random.c:(.text+0x410): multiple definition of `arc4random'
/usr/local/lib/libcrypto.a(arc4random.o):(.text+0x0): first defined here
/usr/lib/libc.a(arc4random.o): In function `arc4random_buf':
/usr/src/lib/libc/gen/arc4random.c:(.text+0x580): multiple definition of `arc4random_buf'
/usr/local/lib/libcrypto.a(arc4random.o):(.text+0x80): first defined here

PatchyFog/lighttpd1.4-mbedtls,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,PatchyFog/lighttpd1.4-mbedtls,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,PatchyFog/lighttpd1.4-mbedtls,PatchyFog/lighttpd1.4-mbedtls,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,PatchyFog/lighttpd1.4-mbedtls,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,PatchyFog/lighttpd1.4-mbedtls,PatchyFog/lighttpd1.4-mbedtls