doc: Add sources for SPEC7 read the docs

Signed-off-by: Mamta Shukla <mamta.ramendra.shukla@cern.ch>
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Status Job ID Name Coverage
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failed #6256
vitis_vivado_2019.2
SPEC7_REF_DESIGN build

01:16

 
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failed
SPEC7_REF_DESIGN build Build There has been a runner system failure, please try again
Entering 'sw/spec7-ps-sw'
HEAD is now at 5cb6a8f Added autoboot cmd to autoload slot1
Entering 'hdl/wr-cores'
Entering 'sw/spec7-ps-sw'
Executing "step_script" stage of the job script
Using docker image sha256:24bccba6dfb6c964cbc5f7e8f5b045cf9c08762d3e563dd3cd6a2911712d6dd3 for xilinx-vitis-vivado:2019.2 ...
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ERROR: Job failed: aborted: terminated