dependencies/cmake: blacklist cmake 3.7

cmake-3.7 has a bug in how it handles rpath, linking with libraries from
the host.

Until we completely understand the issue, just blacklist cmake-3.7.

The issue has been reported upstream:
    http://public.kitware.com/pipermail/cmake/2017-February/064970.html

Reported-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Jörg Krause <joerg.krause@embedded.rocks>
Cc: Ben Boeckel <mathstuf@gmail.com>
Cc: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

support/dependencies/check-host-cmake.sh

@@ -6,6 +6,9 @@ version_min="${2}"
 major_min="${version_min%.*}"
 minor_min="${version_min#*.}"
 
+# cmake-3.7 incorrectly handles rpath, linking to host libraries
+blacklist_version="3.7"
+
 cmake=`which ${candidate}`
 if [ ! -x "${cmake}" ]; then
     # echo nothing: no suitable cmake found
@@ -27,6 +30,11 @@ version="$(${cmake} --version \
 major="${version%.*}"
 minor="${version#*.}"
 
+if [ "${version}" = "${blacklist_version}" ]; then
+    # echo nothing: no suitable cmake found
+    exit 1
+fi
+
 if [ ${major} -gt ${major_min} ]; then
     echo "${cmake}"
 else