REG_EIP is already defined elsewhere for Linux.

Can potentially send upstream.

diff --git a/js/src/asmjs/AsmJSSignalHandlers.cpp b/js/src/asmjs/AsmJSSignalHandlers.cpp

--- a/js/src/asmjs/AsmJSSignalHandlers.cpp

+++ b/js/src/asmjs/AsmJSSignalHandlers.cpp

@@ -116,6 +116,9 @@

# define R14_sig(p) ((p)->sc_r14)

# define R15_sig(p) ((p)->sc_r15)

#elif defined(__linux__) || defined(SOLARIS)

+# if defined(SOLARIS)

+# define REG_EIP EIP

+# endif

# if defined(__linux__)

# define XMM_sig(p,i) ((p)->uc_mcontext.fpregs->_xmm[i])

# define EIP_sig(p) ((p)->uc_mcontext.gregs[REG_EIP])