[DellEMC] Dell Platform Modules Debian Build Error Fix

[santhosh-kt]

- What I did

• Fix for Azure/sonic-buildimage#4095
• Exit status from failed make command(action) didnt reached parent target because the make command is inside the "for" loop.
• Only the exit status of the last command in the last iteration of the for loop is read by parent target.
• This is the reason why dpkg-buildpackage ignored the make error.
• Fixed the issue with help of "set -e".

- How I did it
On branch s6000-build-error
Changes to be committed:
(use "git reset HEAD ..." to unstage)

    modified:   platform/broadcom/sonic-platform-modules-dell/s6000/modules/dell_s6000_platform.c

- How to verify it
Attached UT Logs:
Before Fix - platform-modules-z9100_1.1_amd64.deb-without-fix.log.txt

After Fix - platform-modules-z9100_1.1_amd64.deb-with-fix.log.txt
After Fix and platfrom debian completed with no issues log - platform-modules-z9100_1.1_amd64.deb-no-error.log.txt

- Description for the changelog

[DellEMC] Dell Platform Modules Debian Build Error Fix

- A picture of a cute animal (not mandatory but encouraged)

[santhosh-kt]

Will check and update the build failure message.

[santhosh-kt]

Note: Upon build failure on vendor specific files , until the failure is addressed, further builds will be stopped.

[lguohan]

what about failure in the install phase?

[santhosh-kt]

Updated.

[padmanarayana]

Fixes #4095