ANDROID: Disable hermetic toolchain for allmodconfig builds

allmodconfig builds require a full implementation of openssl as of
today. The hermetic toolchain provides only a subset through boringssl.

Fixes: 6991ab0b2dc1 ("ANDROID: Enable hermetic toolchain")
Signed-off-by: Matthias Maennich <maennich@google.com>
Change-Id: Idcd0233893059d4a10951edf51cba0b3b7a9a0f1
diff --git a/build.config.allmodconfig b/build.config.allmodconfig
index 89b6c5c..f35ffe6 100644
--- a/build.config.allmodconfig
+++ b/build.config.allmodconfig
@@ -1,5 +1,7 @@
 DEFCONFIG=allmodconfig
 
+HERMETIC_TOOLCHAIN=0
+
 POST_DEFCONFIG_CMDS="update_config"
 function update_config() {
     ${KERNEL_DIR}/scripts/config --file ${OUT_DIR}/.config \