linux_ptrace_dumper: Fix type definition

Fix a type definition, so it doesn't collide if the similar
type is already defined in the sysroot headers.

Test: Build for Android/Linux.
Bug: Internal 322205293
Change-Id: I3453de725083b01f2e69a61a7fc948f9f8ca5eca
Signed-off-by: Volodymyr Riazantsev <[email protected]>
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/5251488
Reviewed-by: Joshua Peraza <[email protected]>

src/client/linux/minidump_writer/linux_ptrace_dumper.cc

@@ -68,7 +68,7 @@
  * User specific VFP registers. If only VFPv2 is present, registers 16 to 31
  * are ignored by the ptrace system call and the signal handler.
  */
-typedef struct user_vfp {
+typedef struct {
   unsigned long long fpregs[32];
   unsigned long fpscr;
 // Kernel just appends fpscr to the copy of fpregs, so we need to force
@@ -204,7 +204,7 @@ bool LinuxPtraceDumper::ReadRegisterSet(ThreadInfo* info, pid_t tid)
     switch (errno) {
       case EIO:
       case EINVAL:
-        user_vfp vfp;
+        user_vfp_t vfp;
         struct iovec io;
         io.iov_base = &vfp;
         io.iov_len = sizeof(vfp);
@@ -252,7 +252,7 @@ bool LinuxPtraceDumper::ReadRegisters(ThreadInfo* info, pid_t tid) {
     switch (errno) {
       case EIO:
       case EINVAL:
-        user_vfp vfp;
+        user_vfp_t vfp;
         struct iovec io;
         io.iov_base = &vfp;
         io.iov_len = sizeof(vfp);