Update the RVV spec doc

Point to the RISC-V-V-Spec release link instead of storing a binary file
in our repo. Update it to v1.0-rc.

Change-Id: I350c6b84a8fe472e12ff0bb1bf420a37c3a47914

RiscVVectorSpecDoc.md

diff --git a/RiscVVectorSpecDoc.md b/RiscVVectorSpecDoc.md
new file mode 100644
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+# RISC-V Vector Extension Specifications
+
+* Specification Doc: [v1.0-rc PDF](https://github.com/riscv/riscv-v-spec/releases/download/v1.0-rc1/riscv-v-spec-1.0-rc1.pdf)
+* [Source](https://github.com/riscv/riscv-v-spec)

riscv-v-spec.pdf

diff --git a/riscv-v-spec.pdf b/riscv-v-spec.pdf
deleted file mode 100644
index bdcb7a2..0000000
--- a/riscv-v-spec.pdf
+++ /dev/null
Binary files differ