Add security policy for file syncing

[spbrogan]

No description provided.

[spbrogan]

Will provide the solution that closes or resolves:

• This repo is missing important files mu#130
• This repo is missing important files mu_basecore#141
• Adding Microsoft SECURITY.MD mu_basecore#109
• This repo is missing important files mu_plus#74
• Adding Microsoft SECURITY.MD mu_plus#48
• This repo is missing important files mu_tiano_plus#46
• Adding Microsoft SECURITY.MD mu_tiano_plus#19
• This repo is missing important files mu_oem_sample#15
• Adding Microsoft SECURITY.MD mu_oem_sample#7
• This repo is missing important files mu_silicon_arm_tiano#21
• Adding Microsoft SECURITY.MD mu_silicon_arm_tiano#15
• This repo is missing important files mu_silicon_intel_tiano#17
• Adding Microsoft SECURITY.MD mu_silicon_intel_tiano#7
• This repo is missing important files mu_feature_mm_supv#16
• Adding Microsoft SECURITY.MD mu_feature_mm_supv#5
• Adding Microsoft SECURITY.MD mu_crypto_release#4
• Adding Microsoft SECURITY.MD mu_common_intel_min_platform#43
• This repo is missing important files mu_common_intel_min_platform#67