[mips] Make little-endian disassembler test filenames consistent.

Most are named *-el.txt. Renamed the three that were *-le.txt

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240884 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/MC/Disassembler/Mips/mips32r2/valid-mips32r2-le.txt b/test/MC/Disassembler/Mips/mips32r2/valid-mips32r2-el.txt
similarity index 100%
rename from test/MC/Disassembler/Mips/mips32r2/valid-mips32r2-le.txt
rename to test/MC/Disassembler/Mips/mips32r2/valid-mips32r2-el.txt

diff --git a/test/MC/Disassembler/Mips/mips32r3/valid-mips32r3-le.txt b/test/MC/Disassembler/Mips/mips32r3/valid-mips32r3-el.txt
similarity index 100%
rename from test/MC/Disassembler/Mips/mips32r3/valid-mips32r3-le.txt
rename to test/MC/Disassembler/Mips/mips32r3/valid-mips32r3-el.txt

diff --git a/test/MC/Disassembler/Mips/mips32r5/valid-mips32r5-le.txt b/test/MC/Disassembler/Mips/mips32r5/valid-mips32r5-el.txt
similarity index 100%
rename from test/MC/Disassembler/Mips/mips32r5/valid-mips32r5-le.txt
rename to test/MC/Disassembler/Mips/mips32r5/valid-mips32r5-el.txt