tf-a: add NVM_DIR to environment

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Change-Id: I43bd0284acbb39d72232124a3834b047eaae9b92
diff --git a/bionic-amd64-tf-a-build/tf-environment.install b/bionic-amd64-tf-a-build/tf-environment.install
index c1bef6f..1a66804 100755
--- a/bionic-amd64-tf-a-build/tf-environment.install
+++ b/bionic-amd64-tf-a-build/tf-environment.install
@@ -3,6 +3,7 @@
 set -e
 
 env | grep ARMLMD_LICENSE_FILE  >> /etc/environment
+env | grep NVM_DIR >> /etc/environment
 env | grep PLANTUML_JAR_PATH >> /etc/environment
 env | grep TOOLS_DIR >> /etc/environment
 env | grep PATH >> /etc/environment