Provisioning: Add variables properly in .bashrc

If we, in a provisioning script, add $PATH to another
file, that $PATH gets expanded there and now. We need it
written as $PATH to the target file, so that it gets expanded
when the other file is run. Not at the moment of running this
provisioning script.

Change-Id: Ie2c64764f9e0a676307cb3a144162cbc35eb33fb
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

coin/provisioning/qtci-macos-10.12-x86_64/035-openssl.sh

@@ -73,8 +73,8 @@ try
     sudo mkdir -p "$path"
     sudo ln -s /usr/local/openssl-$opensslVersion $opensslTargetLocation || throw $ExceptionLN
 
-    echo "export PATH=\"$opensslTargetLocation/bin:$PATH\"" >> ~/.bashrc
-    echo "export MANPATH=\"$opensslTargetLocation/share/man:$MANPATH\"" >> ~/.bashrc
+    echo "export PATH=\"$opensslTargetLocation/bin:\$PATH\"" >> ~/.bashrc
+    echo "export MANPATH=\"$opensslTargetLocation/share/man:\$MANPATH\"" >> ~/.bashrc
 
     security find-certificate -a -p /Library/Keychains/System.keychain | sudo tee -a $opensslTargetLocation/ssl/cert.pem || throw $ExceptionCertificate
     security find-certificate -a -p /System/Library/Keychains/SystemRootCertificates.keychain | sudo tee -a $opensslTargetLocation/ssl/cert.pem || throw $ExceptionCertificate