RFR: JDK-8287288: Fix some typos in C1

[Zhuojun Miao]

This is a trivial patch to fix some typos in C1.
e.g. https://github.com/openjdk/jdk/blob/master/src/hotspot/share/c1/c1_LIRGenerator.cpp#L1190

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Commit messages:
 - JDK-8287288: Fix some typos in C1

Changes: https://git.openjdk.java.net/jdk/pull/8880/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8880&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8287288
  Stats: 14 lines in 6 files changed: 0 ins; 3 del; 11 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8880.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8880/head:pull/8880

PR: https://git.openjdk.java.net/jdk/pull/8880