[SPARK-22167][R][BUILD] sparkr packaging issue allow zinc

## What changes were proposed in this pull request?

When zinc is running the pwd might be in the root of the project. A quick solution to this is to not go a level up incase we are in the root rather than root/core/. If we are in the root everything works fine, if we are in core add a script which goes and runs the level up

## How was this patch tested?

set -x in the SparkR install scripts.

Author: Holden Karau <[email protected]>

Closes apache#19402 from holdenk/SPARK-22167-sparkr-packaging-issue-allow-zinc.

Author: holdenk

R/install-dev.sh

@@ -28,6 +28,7 @@
 
 set -o pipefail
 set -e
+set -x
 
 FWDIR="$(cd "`dirname "${BASH_SOURCE[0]}"`"; pwd)"
 LIB_DIR="$FWDIR/lib"

core/pom.xml

@@ -499,7 +499,7 @@
               </execution>
             </executions>
             <configuration>
-              <executable>..${file.separator}R${file.separator}install-dev${script.extension}</executable>
+              <executable>${project.basedir}${file.separator}..${file.separator}R${file.separator}install-dev${script.extension}</executable>
             </configuration>
           </plugin>
         </plugins>